<ComVisibleAttribute(True)> _
Public Interface IComparable

Dim instance As IComparable

[ComVisibleAttribute(true)] 
public interface IComparable

[ComVisibleAttribute(true)] 
public interface class IComparable

/** @attribute ComVisibleAttribute(true) */ 
public interface IComparable

ComVisibleAttribute(true) 
public interface IComparable

Public Class Temperature
    Implements IComparable

    Public Overloads Function CompareTo(ByVal obj As Object) As Integer _
        Implements IComparable.CompareTo

        If TypeOf obj Is Temperature Then
            Dim temp As Temperature = CType(obj, Temperature)

            Return m_value.CompareTo(temp.m_value)
        End If

        Throw New ArgumentException("object is not a Temperature")
    End Function

    ' The value holder
    Protected m_value As Integer

    Public Property Value() As Integer
        Get
            Return m_value
        End Get
        Set(ByVal Value As Integer)
            m_value = Value
        End Set
    End Property

    Public Property Celsius() As Integer
        Get
            Return (m_value - 32) / 2
        End Get
        Set(ByVal Value As Integer)
            m_value = Value * 2 + 32
        End Set
    End Property
End Class

public class Temperature : IComparable {
    /// <summary>
    /// IComparable.CompareTo implementation.
    /// </summary>
    public int CompareTo(object obj) {
        if(obj is Temperature) {
            Temperature temp = (Temperature) obj;

            return m_value.CompareTo(temp.m_value);
        }
        
        throw new ArgumentException("object is not a Temperature");    
    }

    // The value holder
    protected int m_value;

    public int Value {
        get {
            return m_value;
        }
        set {
            m_value = value;
        }
    }

    public int Celsius {
        get {
            return (m_value-32)/2;
        }
        set {
            m_value = value*2+32;
        }
    }
}

public ref class Temperature: public IComparable {
   /// <summary>
   /// IComparable.CompareTo implementation.
   /// </summary>
protected:
   // The value holder
   Double m_value;

public:
   virtual Int32 CompareTo( Object^ obj ) {
      if ( obj->GetType() == Temperature::typeid ) {
         Temperature^ temp = dynamic_cast<Temperature^>(obj);

         return m_value.CompareTo( temp->m_value );
      }

      throw gcnew ArgumentException(  "object is not a Temperature" );
   }

   property Double Value {
      Double get() {
         return m_value;
      }
      void set( Double value ) {
         m_value = value;
      }
   }

   property Double Celsius  {
      Double get() {
         return (m_value - 32) / 1.8;
      }
      void set( Double value ) {
         m_value = value * 1.8 + 32;
      }
   }
};

public class Temperature implements IComparable
{
    /// <summary>
    /// IComparable.CompareTo implementation.
    /// </summary>
    public int CompareTo(Object obj)
    {
        if (obj instanceof Temperature) {
            Temperature temp = (Temperature)obj;
            return ((Int32)mValue).CompareTo(temp.mValue);
        }
        throw new ArgumentException("object is not a Temperature");
    } //CompareTo

    // The value holder
    protected int mValue;

    /** @property
     */
    public int get_Value()
    {
        return mValue;
    }//get_Value

    /** @property
     */
    public void set_Value(int value)
    {
        mValue = value;
    }//set_Value

    /** @property
     */
    public int get_Celsius()
    {
        return (mValue - 32) / 2;
    }//get_Celsius

    /** @property 
     */
    public void set_Celsius(int value)
    {
        mValue = value * 2 + 32;
    }//set_Celsius
} //Temperature